What a topographic survey gives your architect

This note is for design and due diligence. It is not legal advice, not a cadastral determination, and not development permission. An architect designs. A licensed surveyor measures. A planner and the county decide use. An advocate handles the title.

An architect cannot design from a seller’s sketch, a phone GPS pin, or a Registry Index Map. Those things answer — at best — a different question. Kenyan law already splits rights (the register) from place (the cadastral map and any survey that feeds it) from use (planning permission). A topographic survey answers a fourth, practical question: what is actually on this ground, and at what level, so the drawings are true.

A topographic survey is not a title survey

The Land Registration Act, 2012, section 18 is the reason you must not design from the cadastral map alone. Unless the register notes that the boundaries have been fixed, that map and any filed plan show only the approximate line and situation. The Land Registration (General) Regulations, 2017 record an approximate area in the property section, and a cadastral plan number only where the line has been fixed.

A topographic survey does not fix that line. It does not transfer land. It does not replace an official search. If the house must sit inside the legal parcel — and it must — the cadastral question is still open. That is a Land Check and, if needed, a field survey under the Survey Act (Cap. 299), not a contour interval.

Section 19 of the Land Registration Act is how a boundary becomes fixed on the register. Section 20 is how the proprietor keeps the marks. Neither is a licence to treat the existing fence as the building line.

What the architect actually needs from the ground

Design starts from levels, features and control that can be held. A proper topographic survey gives:

• site control that the design team and, later, the contractor can occupy again;
• contours and spot heights — so cut, fill, drainage and floor levels are not guessed;
• what is on the land: buildings, trees, access, drains, visible services, neighbouring occupation;
• digital files (CAD and the like) the architect or engineer can draw on, not a pretty picture.

That is still survey work. The Survey Act makes a licensed surveyor responsible for the correctness of every survey carried out by that surveyor or under that surveyor’s supervision. The Survey Regulations (Legal Notice 168 of 1994, as revised) govern how control is held and who may assist. An approved assistant works only under the licensed surveyor’s direct personal control. A drone fly-over without that control is a photograph, not a Build-Ready Site.

Rational thought: if the architect draws from a Google image and the contractor sets out from a different fence, the building will be true to neither the paper nor the ground. You will pay twice.

Planning still sits on top of the drawing

The Physical and Land Use Planning Act, 2019 is the development-control statute. Section 57: you do not carry out development in a county without development permission. Section 58: you apply, with the documents, plans and particulars the county requires, and you state the proposed use. Section 59: those plans and documents are to be prepared by the relevant qualified, registered and licensed professionals. Section 60: the county refers the application to other authorities — including land survey — for comment.

The Physical and Land Use Planning (General Development Permission and Control) Regulations, 2021 (Legal Notice 253) spell out change of user, extension of user, and the supporting plans. A topographic survey does not grant that permission. It supports the location, scheme and site drawings the architect and planner will lodge. A road reserve, a building line or a zoning setback can constrain the design even when the cadastral line is clear. Those constraints belong on the topo. They are not the topo’s job to invent.

The Land Act, 2012 and the user recorded in the property section still matter. If the register says agricultural and you intend flats, the dealing and the planning application are both incomplete. Measure the ground anyway — then do not pretend the user changed because the contours are beautiful.

Occupation, services and common sense

Common law and ordinary observation agree: what is on the land is evidence. A path, a neighbour’s eaves, a power line, a wet corner — the Land Registration Act (section 28) already treats some of these as overriding interests that need not appear on the title. The topo should show what the designer will hit. The advocate should be told what the register will not show. The surveyor should not hide either.

Do not start foundations from a screenshot. Do not ask the architect to “just use the deed plan.” Do not ask the surveyor to grant development permission. Different statutory questions. Different products.

What comes after the topo

1. If you do not yet know whether the land is the land you think it is: stop and do a Land Check first.
2. If the line itself is the problem: that is a boundary / cadastral job, not contours.
3. If the site is the right site and design is about to start: a Build-Ready Site — topographic survey, control, digital files.
4. If drawings are already approved and construction is starting: setting out. That is a later, different piece of work. We do not guess a line on site.

If your architect is waiting on the ground, start with the topographic survey — and be honest about whether the legal parcel has been checked.

Related: buying land — what to check · where is the boundary? · can I subdivide this land? · surveyor in Thika.